three died during a roadside bombing in eastern afghanistan. the fourth during a separate nurnt attack. 200 troops have been killed in afghanistan this year. >>> in kabul, general karzai and general petraeus. an unannounced trip there. petraeus is leaving afghanistan to become director of the cia. the senate gets back to work today on talks to raise the debt limit. less than four weeks before the u.s. potentially defaults on its debts. ron johnson of wisconsin was asked if the two sides can agree on whether taxes should be raised. >> i sure think so. there's a growing group of, i think, senate republicans and house republicans that are willing to increase the debt ceiling as long as we actually fix the problem. >> delaware senator chris coons says he thinks an agreement can be reached. >> it's their refusal to consider any increase in revenue that has really stalled the talks so far. i'm hopeful we'll be able to move past that in this week's negotiation. >> an autopsy is scheduled for today to determine if a body that's been found is that of mi